General Voltage and current display relays are microprocessor-based voltage monitoring devices for single-phase AC networks to protect electrical equipment from surge voltage. The device analyzes the main voltage and displays its current value on a digital indicator. Load is switched by electro-magnetic relay. The user can set the current voltage value and delay time through the button. The value is stored in non-volatile memory. Aluminum wires and copper wires can be used for connection. Technical data Rated supply voltage: 220VAC Rated frequency: 50/60Hz Max. operating phase voltage: 350V Max. operating current: 63A Max. power of load(kW): 13.9 kW >U setting range: 130-300V <U setting range: 80-210V Voltage hysteresis: 5V Overvoltage trip delay: 0.5s Voltage accuracy: <1% Altitude: ≤2000m Permissible relative humidity: ≤50% at 40°C (without condensation) Storage temperature: -25°C to +55°C Ambient temperature: -25°C to +50°C Net weight: 159g. Size: 81•36•66mm